---
product_id: 58789251
title: "Otterbein Natural Hydraulic Lime 3.5, 25 kg Bag"
brand: "otterbein"
price: "€ 977.77"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/58789251-otterbein-natural-hydraulic-lime-3-5-25-kg-bag
store_origin: HR
region: Croatia
---

# Superior water retention High sulfate resistance Historic, cement-free binder Otterbein Natural Hydraulic Lime 3.5, 25 kg Bag

**Brand:** otterbein
**Price:** € 977.77
**Availability:** ✅ In Stock

## Summary

> 🧱 Elevate your restoration game with Otterbein’s natural hydraulic lime — where tradition meets tech!

## Quick Answers

- **What is this?** Otterbein Natural Hydraulic Lime 3.5, 25 kg Bag by otterbein
- **How much does it cost?** € 977.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/58789251-otterbein-natural-hydraulic-lime-3-5-25-kg-bag)

## Best For

- otterbein enthusiasts

## Why This Product

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

## Key Features

- • **Salt Shield:** Prevents damaging salt penetration, protecting your masonry investment from hidden decay.
- • **Built to Last:** High sulfate resistance ensures your masonry stands strong against harsh environmental stressors.
- • **Moisture Mastery:** Exceptional water retention capacity keeps mortar hydrated for optimal curing and longevity.
- • **Flexible Strength:** Low-tension hardening and low elasticity module deliver durable yet adaptable mortar performance.
- • **Eco-Chic Restoration:** Cement- and gypsum-free natural hydraulic lime for sustainable, historic building preservation.

## Overview

Otterbein Natural Hydraulic Lime 3.5 is a 25 kg bag of historic, cement- and gypsum-free binder certified to EN 459-1. It offers high sulfate resistance, low-tension hardening, excellent water retention, and strong adhesion to stone, making it ideal for ecological building and historic restoration projects. This product prevents salt damage and ensures durable, flexible mortar with proven compression strength up to 10.5 N/mm² after 12 months.

## Description

Mixing Ratio 1 part NHL to 3.5 part sand maximum Weight 25 kg Composition CALCIDUR NHL 3.5 is a natural hydraulic lime acc. to EN 459-1. It is produced through burning and staking a specifically selected shell limestone. The stabilizing process of CALCIDUR NHL 3.5 is effected through carbonation and hydraulic hardening. CALCIDUR NHL 3.5 is free from cement! Properties historic, cement- and gypsum-free natural hydraulic binder high sulfate resistance low-tension hardening process very good subsequent hardening properties no penetration of damaging salts into the masonry high elasticity and water retention capacity in mortar produced very good side adhesion at stone low elasticity module Application For the production of plaster- and brick mortar in ecological,biological building construction, in the restoration and preservation of historic buildings. Storage Dry, if possible on wooden shelves and protected against draft. Technical data Bulk density: approx. 0.55 kg/dm3 free CaO: approx. 32% SO3: approx. 0.4 % Compression strength ( acc. to EN 459-2): 28 days: approx. 4.8 N/mm2 6 months: approx. 8.5 N/mm2 12 months: approx. 10.5 N/mm2 Safety instructions CALCIDUR NHL 3.5 reacts strongly alkaline with water, thus: Protect skin and eyes, rinse thoroughly with water in case of contact, immediately contact doctor in case of eye contact. Quality-monitored production CALCIDUR NHL 3.5 is continuously tested in our plant laboratory within the scope of our in-house monitoring with respect to the fulfilment of composition and properties. This will ensure a uniform quality of the product. CALCIDUR NHL 3.5 has the quality certificate „Building lime“ and is certified acc. to EN 459-1.

## Features

- Historic, cement- and gypsum-free natural hydraulic binder
- High sulphate resistance, low-tension hardening process
- High elasticity and water retention capacity in mortar produced
- Very good side adhesion at stone, low elasticity module
- No penetration of damaging salts into the masonry

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Number of Items | 1 |
| Manufacturer | Otterbein |
| Part Number | A2022109 |
| Item Weight | 54.9 pounds |
| Product Dimensions | 26 x 6 x 16 inches |
| Is Discontinued By Manufacturer | No |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Otterbein
- **Item dimensions L x W x H:** 26 x 6 x 16 inches
- **Color:** Lime, Stone
- **Shape:** Bag
- **UPC:** 705911484283

## Images

![Otterbein Natural Hydraulic Lime 3.5, 25 kg Bag - Image 1](https://m.media-amazon.com/images/I/41bzUbSE-tL.jpg)

## Questions & Answers

**Q: could this lime mortar be mixed with sand and used for re-pointing a brick chimney?**
A: yes, I pointed and replaced soft brick that were made in the 1870s on a north facing, shaded and wet wall. Worked well, my ratio was 3 part sand, 1.25 lime, .25 Portland cement. It is difficult to find technical information on ratios and applications.

**Q: What type of sand should be used?**
A: Finding the right sand is not easy and it matters for how good the plaster turns out. One wants sand with rough grains in contrast to smooth round so no beach or river sand. As sand is locally quite variant it might require some search to find it. Grain size determines how fine the finish and layer dimensions can be achieved

## Frequently Bought Together

- Otterbein Natural Hydraulic Lime 3.5, 25 kg Bag
- SENCTRL 0-30 PSI Glycerin Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4 NPT, Stainless Steel Case, Lower Mount, for Water Oil Air Pressure Test

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-21*