---
product_id: 489072335
title: "Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use"
brand: "triplast"
price: "₱1777"
currency: PHP
in_stock: true
reviews_count: 9
category: "Triplast"
url: https://www.desertcart.ph/products/489072335-triplast-50-x-c5-white-self-seal-security-envelopes-size
store_origin: PH
region: Philippines
---

# C5 size 229x164mm Blue security pattern inside Self-seal adhesive closure Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use

**Brand:** triplast
**Price:** ₱1777
**Availability:** ✅ In Stock

## Summary

> 🔐 Seal your secrets in style—secure, sleek, and sustainable!

## Quick Answers

- **What is this?** Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use by triplast
- **How much does it cost?** ₱1777 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/489072335-triplast-50-x-c5-white-self-seal-security-envelopes-size)

## Best For

- triplast enthusiasts

## Why This Product

- Trusted triplast brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Printer-Ready:** Compatible with most inkjet and laser printers for seamless office workflow.
- • **Effortless Sealing:** Self-seal adhesive means no tape, glue, or licking—just fold and press.
- • **Eco-Conscious Choice:** Made from PEFC-certified paper sourced from sustainably managed forests.
- • **Versatile Everyday Use:** Perfect for mailing invoices, letters, brochures, and more in home or office.
- • **Confidentiality Guaranteed:** Blue high-security pattern scrambles text to keep your documents private.

## Overview

Triplast C5 Self Seal Security Envelopes (50 pack) offer a 229x164mm fully opaque design with a blue internal security pattern to protect confidential contents. Featuring hassle-free self-seal adhesive and printer compatibility, these 90gsm white envelopes are ideal for everyday home, office, and commercial mailing needs. Made in the UK from PEFC-certified sustainable paper, they combine security, convenience, and eco-responsibility.

## Description

Product Description Triplast White Self Seal Security Envelopes are the perfect mailing supply to save you time and effort. They are designed to stay sealed with no tape, glue or any kind of moisture. Just close the flap and press shut! The high-security blue tinted pattern on the inside will ensure the contents remain safe and secure without revealing sensitive details. Manufactured with a 90 gsm thickness for an ideal blend of lightness and durability, these envelopes are perfect to be used on a daily basis at home, at work, or in commercial settings. Sustainably produced, the paper used to make them is sourced from forests that have been well-managed, controlled, audited, and certified, and do not contribute to deforestation. There are a wide variety of sizes and quantities to choose from. The sizes available are: C4 (324x229mm), C5 (229x164mm), DL (110x220 mm), & C6 (114x162mm). We also stock them in 2 other types: Window Self Seal Security Envelopes & Manilla Self Seal Security Envelopes . Self Seal Closure Just fold & press the flap to secure shut - these envelopes are designed to stay sealed with no tape or glue! Enhanced Security A high-security blue tinted pattern on the inside ensures that the contents remain hidden from prying eyes Printer Friendly These envelopes are compatible with most inkjet and laser printers for quick addressing Multipurpose A cost-effective option for everyday use at home, in the workplace, or in commercial settings About Triplast We are a UK based manufacturer, distributor and supplier of packaging products & office supplies including cardboard boxes, bubble wrap, kraft wrapping paper, corrugated cardboard paper, plastic mailing bags, bubble padded envelopes, cardboard & paper envelopes and other e-commerce, retail & industrial packaging products. Our years of experience and well established presence in the flexible packaging industry coupled with our state-of-the-art automated machinery means you can be rest assured when buying our products. We have great confidence in our products but if for any reason you are unhappy with your purchase, please send us a message and we promise to revert to you with a swift resolution.

Review: Good quality - Good envelopes for use in a small home business. Good quality paper, nice and sturdy and stick well. Good value for money. Will buy again.
Review: Great product - Great product

## Features

- CONTENTS: Pack of 50 White Plain Mailing Envelopes | SIZE: C5 | LENGTH: 229 mm / 9.02 in | WIDTH: 164mm / 6.46 in | THICKNESS: 90 gsm | MADE in the UK
- ENHANCED SECURITY: These envelopes feature a blue high security pattern on the inside that scrambles text to ensure contents remain concealed when in-transit or storage. Send confidential documents with total confidence & peace of mind!
- HASSLE-FREE & PRACTICAL: The self-seal adhesive eliminates the need for any tape, glue or licking to seal these envelopes - just fold & press the top flap to secure shut! These envelopes are also compatible with most inkjet and laser printers.
- MULTIPURPOSE: These envelopes are ideal for mailing & organising invoices, letters, statements, catalogues, periodicals, brochures, etc. They are a cost-effective option for everyday home, office & commercial use!
- RECYCLABLE & PEFC CERTIFIED: Apart from being fully recyclable, these envelopes are made from paper sourced in a natural & controlled manner from SUSTAINABLY MANAGED FORESTS that also PROTECT THE RIGHTS OF WORKERS along the production process.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B3S1JMRQ |
| Best Sellers Rank | 53 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 1 in Catalogue Envelopes |
| Brand | Triplast |
| Brand Name | Triplast |
| Closure Type | Self-Seal |
| Closure type | Self-Seal |
| Colour | White |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.4 out of 5 stars 1,807 Reviews |
| Item Dimensions L x W | 22.9L x 16.4W centimetres |
| Item Shape | Rectangular |
| Item Type Name | Plain Envelope |
| Manufacturer | Triplast |
| Material | Paper |
| Material Type | Paper |
| Number of Items | 50 |
| Number of items | 50 |
| Occasion | Anytime |
| Occasion Type | Anytime |
| Recommended Uses For Product | Security |
| Size | Plain - C5 (229x164mm) |
| Special Features | Self Seal |
| Style | Flat |
| Unit Count | 50.0 count |

## Product Details

- **Brand:** Triplast
- **Colour:** White
- **Closure type:** Self-Seal
- **Occasion:** Anytime
- **Material:** Paper

## Images

![Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use - Image 1](https://m.media-amazon.com/images/I/61Kqct8QqFL.jpg)
![Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use - Image 2](https://m.media-amazon.com/images/I/61ithjjxbML.jpg)
![Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use - Image 3](https://m.media-amazon.com/images/I/712tUosUW4L.jpg)
![Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use - Image 4](https://m.media-amazon.com/images/I/81mHec2wyZL.jpg)
![Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use - Image 5](https://m.media-amazon.com/images/I/71SGZS-4-VL.jpg)

## Available Options

This product comes in different **Size, Number Of Items** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality
*by A***R on 14 February 2026*

Good envelopes for use in a small home business. Good quality paper, nice and sturdy and stick well. Good value for money. Will buy again.

### ⭐⭐⭐⭐⭐ Great product
*by D***N on 4 May 2026*

Great product

### ⭐⭐⭐⭐ Good value
*by S***P on 21 April 2026*

Well made, although not as thick paper as some, they seal well, good value

## Frequently Bought Together

- Triplast 50 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial Use
- GP Globe Packaging 50 x C4 A4 White Plain Self Seal Paper Envelopes (Size: 324x229mm) - Printer Safe & Fully Opaque Security Envelopes - Business Mailing Envelopes for Office & Home Use
- NU: Multi-Purpose Printer Paper, White, 500 Sheets

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**Shop now:** [https://www.desertcart.ph/products/489072335-triplast-50-x-c5-white-self-seal-security-envelopes-size](https://www.desertcart.ph/products/489072335-triplast-50-x-c5-white-self-seal-security-envelopes-size)

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-06-18*