---
product_id: 606423033
title: "PU expanding foam"
price: "82 Lei"
currency: RON
in_stock: null
reviews_count: 8
url: https://www.desertcart.ro/products/606423033-pu-expanding-foam
store_origin: RO
region: Romania
---

# Expands up to 3 inches Superior thermal insulation High-density durable seal PU expanding foam

**Price:** 82 Lei
**Availability:** ❌ Out of Stock

## Summary

> 🛠️ Seal Smart, Live Comfortable – Don’t Let Gaps Cramp Your Style!

## Quick Answers

- **What is this?** PU expanding foam
- **How much does it cost?** 82 Lei with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/606423033-pu-expanding-foam)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** High-density polyurethane foam that flexes with building movement for a resilient, long-lasting seal.
- • **Maximize Every Gap:** Expands aggressively to fill cracks up to 3 inches, ensuring no space is left behind.
- • **Versatile Application:** Perfect for window joints, door frames, AC ducts, vents, and pipe entries—your all-in-one fixer.
- • **Choose Your Perfect Size:** Available in 250 ml, 500 ml, and 750 ml cans to match any project scale without waste.
- • **Thermal & Acoustic Shield:** Keeps your space cozy and quiet by blocking cold drafts and dampening noise effectively.

## Overview

SikaBoom AP PU Joint Filler is a high-expansion, multi-position polyurethane foam designed for professional-grade filling, sealing, and insulating of gaps up to 3 inches. Its durable, flexible formula adapts to building movements while providing superior thermal insulation and noise reduction. Available in multiple sizes, this German-engineered foam is ideal for windows, doors, ducts, and more, delivering a clean, long-lasting finish that enhances energy efficiency and comfort.

## Description

From the manufacturer HOW TO APPLY? Clean and moisten the surface to obtain maximum adhesion and expansion. Shake the can vigorously at least 20 times. Fix the nozzle and extrude the foam by pressing more or less hard on the trigger. Cured foam easy to cut for finishing.

Review: Perfect Gap Fill 👌 - It's really good , completely filled the gap as expected. Pro tip :- after spraying let it sit for 20 mins and push the bulged part inside gently for perfect fit. Cut the extra part maybe after 12 hrs atleast.
Review: usefull - good product use full

## Features

- HIGH EXPANSION RATE – SikaBoom AP expandable foam provides effective filling, sealing and insulation to gaps and cracks up to three inches in size
- IMPROVED DURABILITY – Use this fixing foam to fill and insulate window connection joints and gaps in doorframes, AC duct and vents, roller blind housings and pipe entry points
- FLEXIBLE – Multi-positioning polyurethane foam is high density to provide a strong seal, withstanding building and material movement
- SUPERIOR INSULATION – Being a PU foam spray, it thermally insulates, keeps out the cold and draughts, and dampens noise
- CHOOSE YOUR SIZE – Cans come in 250 ml, 500 ml and 750 ml quantities of light yellow foam

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CRL3TH78 |
| Best Sellers Rank | #59 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Single-component Expanding Foam |
| Brand | SIKA |
| Colour | Light yellow |
| Country of Origin | Germany |
| Customer Reviews | 3.8 3.8 out of 5 stars (2,323) |
| Date First Available | 5 January 2024 |
| Generic Name | Expansing foam |
| Importer | Sika India Private Ltd. Plot No D 101/2, MIDC Industrial Area, Shiravane,, Nerul, 400706 Navi Mumbai, India, Contact: +91-22-6270-4038 |
| Included Components | 1 aerosol |
| Item Dimensions LxWxH | 6 x 6 x 20 Centimeters |
| Item Height | 20 Centimeters |
| Item Weight | 280 g |
| Item Width | 6 Centimeters |
| Item model number | 73836 |
| Manufacturer | Sika, Sika India Private Ltd. Plot No D 101/2, MIDC Industrial Area, Shiravane,, Nerul, 400706 Navi Mumbai, India, Contact: +91-22-6270-4038 |
| Model number | 73836 |
| Net Quantity | 250 Milliliters |
| Number of Memory Sticks | 1 |
| Packer | Sika India Private Ltd. Plot No D 101/2, MIDC Industrial Area, Shiravane,, Nerul, 400706 Navi Mumbai, India, Contact: +91-22-6270-4038 |
| Product Dimensions | 6 x 6 x 20 cm; 280 g |

## Images

![PU expanding foam - Image 1](https://m.media-amazon.com/images/I/51skhTpKifL.jpg)
![PU expanding foam - Image 2](https://m.media-amazon.com/images/I/61NGTxeBQSL.jpg)
![PU expanding foam - Image 3](https://m.media-amazon.com/images/I/718dj8ClYsL.jpg)
![PU expanding foam - Image 4](https://m.media-amazon.com/images/I/71k80mAjPEL.jpg)
![PU expanding foam - Image 5](https://m.media-amazon.com/images/I/61mquFHjO2L.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect Gap Fill 👌
*by A***. on 10 January 2026*

It's really good , completely filled the gap as expected. Pro tip :- after spraying let it sit for 20 mins and push the bulged part inside gently for perfect fit. Cut the extra part maybe after 12 hrs atleast.

### ⭐⭐⭐⭐ usefull
*by B***R on 27 February 2026*

good product use full

### ⭐⭐⭐⭐⭐ Useful DIY
*by D***D on 10 May 2025*

Applied it on plastered wall and door frame. Plastic surface won't hold the adhesive. My door frame was completely damaged due to moisture. Sprayed this product on complete frame and hence the dirt on nozzle that is seen in the picture. The fully cured product feels like thermocol. Lesson learnt: Allow the product to dry 100%. It should feel like rock to touch, only then slice (and not pull) the excess from outer edges. If the cervix is deep, then it takes about 30 to 40 mins to dry. The nozzle can be cleaned once the foam dry to touch as this product doesn't stick to plastic. A little goes a long way. No need to spray until we see the peak of foam coming out of the cervix as the nature of this product is slow expansion. Wear gloves during application else taking the product off the skin is a nightmare. I wish the nozzle was much slimmer.

## Frequently Bought Together

- SIKA – PU expanding foam spray – SikaBoom AP – Single component polyurethane foam – Fast curing – HFC-free – Easy to apply – 250 ml – Light Yellow
- Dr. Fixit Kwik N Ezee Wall Gap & Crack Filler, 150gm (White), DIY Waterproofing for Home Repairs, Kitchen Sink & Wall Cracks, Bathroom Tile Gaps Sealant, Metal, Wood, PVC, Best for Wet & Damp areas
- Unity Brand Tiles Gap Filler Waterproof, Gap Sealant, Grout, White Cement Paste Tube, Gap Filler for Walls and Joints, Waterproof Sealant, Tile Gap Filler Tube for Kitchen, Bathroom (180 ML.)

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**Shop now:** [https://www.desertcart.ro/products/606423033-pu-expanding-foam](https://www.desertcart.ro/products/606423033-pu-expanding-foam)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-13*