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What does the displacement ability (such as ± 25%, ± 35%) of this Gaoseal silicone weather resist

Publisher：Gaoseal       time：2026-02-06

A、 What does displacement capability mean?

Displacement capability refers to the maximum ability of sealant to undergo elastic deformation following the expansion (tension) and contraction (compression) of the joint after curing, without cracking or permanent damage. The displacement is generally expressed as a positive or negative percentage, and the percentage in "± 25%" or "± 35%" is relative to the original width of the joint.
For a 10mm wide seam:
A displacement capacity of ± 25% means it can safely adapt to a width variation of 10mm × 25%=2.5mm.
When the seam width varies between 7.5mm (compressed 2.5mm) and 12.5mm (stretched 2.5mm), the adhesive will not be damaged.
If the ability is within ± 35%, it can adapt to a variation of 10mm × 35%=3.5mm, ranging from 6.5mm to 13.5mm.

B、 How should I choose? (Selection Guide)

The core principle for selecting displacement capability is that the displacement capability of the sealant must be greater than the maximum displacement that may actually occur at the joint.
You can follow the following steps to make your selection:
Step 1: Estimate the maximum expected displacement of the joint: (thermal expansion and contraction, wind load, seismic load, settlement, and creep)
Step 2: Calculate the displacement rate of the joint: Displacement rate (%)=(expected displacement L/original joint width W) × 100%
Step 3: Choose sealant based on displacement rate: general recommendation


Application scenarios

Typical displacement rate range

recommend
Displacement capability level

Recommended Products

Instructions

High rise curtain wall, special structure
(High rise curtain wall, high-rise aluminum veneer)

very big
（≥±30%
Or higher)

±35%
Or higher

Gaoseal 9008（Curtain Wall Weather Resistance

Used for high-rise, super tall buildings or scenarios with high safety requirements.

Joint of group building curtain wall panels
(Aluminum veneer, stone, concrete)

larger
（±15% ~ ±30%
Or higher)

±25%
±35%
Or higher

Gaoseal9959(Aluminum veneer weather resistant)
Gaoseal 995A（Excluding white oil）

The size of the curtain wall panel is large, directly exposed to the outdoors, and there is a large temperature difference between sunlight and rain, so it is necessary to use weather resistant adhesive with displacement ability.

Seam around doors and windows
(Seam between window frame and wall)

moderate
（±10% ~ ±20%）

±20%
±25%

Gaoseal 8009 (Sunroom weather resistance)
Gaoseal 8809 (Low temperature rapid drying)

It needs to withstand seasonal temperature changes and general wind pressure. ± 25% is a common cost-effective option.

Indoor static joint
(Wall panels, small doors and windows)

very small
（≤ ±5%）

±7.5%
±12.5%

Gaoseal 2880 (Door and window assembly)
Gaoseal 2360 (Quick drying adhesive for doors and windows)

The temperature and humidity changes in the indoor environment are small, and there is no high requirement for displacement capability. Pay more attention to sealing and sealing properties.

Summary:
Sealing of high-rise curtain walls: It is recommended to choose products with a rating of ± 35% or higher.
General door and window sealing: Choosing products with a tolerance of ± 25% is safe and common.
Indoor joint sealing: ± 12.5% or ± 20% of the product is fully sufficient.


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