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Frequently Asked Questions
Quick answers to the questions our customers ask most.
How long does shipping take and how much does it cost?
FedEx, DHL and UPS delivery takes approximately 6 to 8 working days, but customs clearance needs to be handled by the customer. If you do not want to handle customs clearance yourself, we can assist you with it, and the delivery will take around 15 working days. The shipping cost will be calculated at checkout based on your delivery address and the order weight.
What is your return and exchange policy?
Items can be returned or exchanged within 30 days after receipt if they are unused and in intact packaging. Please contact us to submit a return request, but the return shipping fee shall be borne by the buyer.
In case of product quality issues, if the customer does not return the goods, we will compensate the customer with the same quantity of the defective products in their next order.
In case of product quality issues, if the customer does not return the goods, we will compensate the customer with the same quantity of the defective products in their next order.
How can I track my order?
After the order is shipped, we will send you the tracking number and logistics query link via WhatsApp or email. You can also log in to your account and open the order page to check the latest delivery status.
Which payment methods do you accept?
We accept major credit and debit cards, PayPal, Apple Pay and Google Pay. All payments are encrypted and processed securely at checkout.
How do I contact customer support?
You can reach our support team by email or live chat, Monday to Friday, 9am to 6pm. We reply to every message within 24 hours.
Why is it taking so long to achieve a gloss finish on a concrete floor after using 400# and 800# abrasives?
1. Too much water and insufficient grinding temperature
Beyond the 800# grit stage, resin-bonded abrasives require a certain level of frictional heat to soften and effectively perform their "filling/polishing" function. If you continue to use large amounts of water—as you might during coarse grinding—the abrasive pads will simply slip at a low temperature, resulting in weak cutting action and a failure to develop a gloss. Once you reach the 1000# stage and beyond, you should significantly reduce the water usage or switch to dry grinding, ensuring the floor surface has only a very thin film of water or remains completely dry.
2. Machine weights left on and/or rotation speed too low
While added weights are necessary for coarse grinding to increase pressure, they become counterproductive during the high-grit polishing phase, as they increase resistance and reduce efficiency. It is recommended to remove the machine weights after the 800# stage and increase the rotation speed (if your machine is equipped with a variable-frequency drive) to allow the pads to bring out the gloss more effectively. If you are using a standard fixed-speed machine, ensure that you are not inadvertently grinding at a low-speed setting.
3. Skipping grit levels or incomplete grinding in earlier stages
If scratches from the 500# or 1000# stages have not been fully removed before moving on to 1500#, the abrasive pads will have to spend excessive time trying to eliminate the deep scratches left by the previous step, which naturally slows down the development of a gloss. Verify that you are following a proper, sequential grinding progression—such as 400# → 800# → 1500# → 3000#—and ensure that each pass is performed thoroughly, with a 45-degree change in direction between stages.
Beyond the 800# grit stage, resin-bonded abrasives require a certain level of frictional heat to soften and effectively perform their "filling/polishing" function. If you continue to use large amounts of water—as you might during coarse grinding—the abrasive pads will simply slip at a low temperature, resulting in weak cutting action and a failure to develop a gloss. Once you reach the 1000# stage and beyond, you should significantly reduce the water usage or switch to dry grinding, ensuring the floor surface has only a very thin film of water or remains completely dry.
2. Machine weights left on and/or rotation speed too low
While added weights are necessary for coarse grinding to increase pressure, they become counterproductive during the high-grit polishing phase, as they increase resistance and reduce efficiency. It is recommended to remove the machine weights after the 800# stage and increase the rotation speed (if your machine is equipped with a variable-frequency drive) to allow the pads to bring out the gloss more effectively. If you are using a standard fixed-speed machine, ensure that you are not inadvertently grinding at a low-speed setting.
3. Skipping grit levels or incomplete grinding in earlier stages
If scratches from the 500# or 1000# stages have not been fully removed before moving on to 1500#, the abrasive pads will have to spend excessive time trying to eliminate the deep scratches left by the previous step, which naturally slows down the development of a gloss. Verify that you are following a proper, sequential grinding progression—such as 400# → 800# → 1500# → 3000#—and ensure that each pass is performed thoroughly, with a 45-degree change in direction between stages.